| 301 | RM & WB DUNN LEASE | McKean County, PA | Oil & Gas Property | Dec 2023 |
| 302 | ROARING RUN UNIT | Lycoming County, PA | Gas Property | Feb 2024 |
| 303 | ROBBINS | Clearfield County, PA | Gas Property | Dec 2023 |
| 304 | ROBBINS BRA | Bradford County, PA | Gas Property | Feb 2024 |
| 305 | ROBERT | Jefferson County, PA | Gas Property | Dec 2023 |
| 306 | ROBERT | Indiana County, PA | Gas Property | Dec 2023 |
| 307 | ROBERT | Crawford County, PA | Oil & Gas Property | Dec 2023 |
| 308 | ROBERT | Armstrong County, PA | Gas Property | Dec 2023 |
| 309 | ROBERT | Westmoreland County, PA | Oil & Gas Property | Dec 2023 |
| 310 | ROBERT | Armstrong County, PA | Gas Property | Dec 2023 |
| 311 | ROBERT | Jefferson County, PA | Gas Property | Dec 2023 |
| 312 | ROBERT | Erie County, PA | Oil & Gas Property | Dec 2023 |
| 313 | ROBERT | Armstrong County, PA | Gas Property | Dec 2023 |
| 314 | ROBERT | Jefferson County, PA | Oil & Gas Property | Dec 2023 |
| 315 | ROBERT | Warren County, PA | Gas Property | Dec 2023 |
| 316 | ROBERT | Armstrong County, PA | Oil & Gas Property | Dec 2023 |
| 317 | ROBERT | Indiana County, PA | Gas Property | Dec 2023 |
| 318 | ROBERT | Indiana County, PA | Gas Property | Dec 2015 |
| 319 | ROBERT | Indiana County, PA | Gas Property | Dec 2023 |
| 320 | ROBERT | Erie County, PA | Gas Property | Dec 2023 |
| 321 | ROBERT & PAULETTE | Indiana County, PA | Gas Property | Dec 2023 |
| 322 | ROBERT A HOY | Clarion County, PA | Gas Property | Dec 2023 |
| 323 | ROBERT ALLISON L | Clarion County, PA | Gas Property | Dec 2023 |
| 324 | ROBERT BOLDIN | Indiana County, PA | Gas Property | Dec 2023 |
| 325 | ROBERT BOWERSOX | Clarion County, PA | Gas Property | Dec 2023 |
| 326 | ROBERT BOYD SPENCE | Indiana County, PA | Oil & Gas Property | Dec 2023 |
| 327 | ROBERT BURN | Clarion County, PA | Gas Property | Mar 2024 |
| 328 | ROBERT BURNS | Clarion County, PA | Gas Property | Dec 2023 |
| 329 | ROBERT BUSH | Mercer County, PA | Oil & Gas Property | Dec 2021 |
| 330 | ROBERT BUTERBAUGH | Indiana County, PA | Gas Property | Dec 2023 |
| 331 | ROBERT C ALLISON | Clarion County, PA | Gas Property | Dec 2023 |
| 332 | ROBERT C LEVIN ET UX | Westmoreland County, PA | Oil & Gas Property | Dec 2023 |
| 333 | ROBERT C ULMER A | Lycoming County, PA | Gas Property | Feb 2024 |
| 334 | ROBERT C. CRISSMAN | Armstrong County, PA | Gas Property | Dec 2023 |
| 335 | ROBERT C. HILLEN ETUX | Fayette County, PA | Gas Property | Dec 2023 |
| 336 | ROBERT COLEMAN | Clarion County, PA | Oil & Gas Property | Dec 2023 |
| 337 | ROBERT D | Crawford County, PA | Gas Property | Dec 2023 |
| 338 | ROBERT D | Indiana County, PA | Gas Property | Dec 2023 |
| 339 | ROBERT E PATRICK | Armstrong County, PA | Gas Property | Dec 2023 |
| 340 | ROBERT E WISSINGER | Indiana County, PA | Oil & Gas Property | Dec 2023 |
| 341 | ROBERT GRAHAM | Westmoreland County, PA | Gas Property | Dec 2023 |
| 342 | ROBERT H NEHRIG | Indiana County, PA | Gas Property | Dec 2023 |
| 343 | ROBERT HAMI | Jefferson County, PA | Gas Property | Dec 2023 |
| 344 | ROBERT HITCHCOCK | Crawford County, PA | Gas Property | Dec 1990 |
| 345 | ROBERT HOUSER | Armstrong County, PA | Gas Property | Dec 2022 |
| 346 | ROBERT J CITERONI | Indiana County, PA | Gas Property | Dec 2023 |
| 347 | ROBERT J FABIN | Indiana County, PA | Gas Property | Dec 2023 |
| 348 | ROBERT J. DILTS FMLY ROY R | Indiana County, PA | Gas Property | Dec 2023 |
| 349 | ROBERT KESTER | Clearfield County, PA | Gas Property | Dec 2023 |
| 350 | ROBERT L. CALHOUN | Armstrong County, PA | Gas Property | Dec 2022 |
| 351 | ROBERT M | Indiana County, PA | Gas Property | Dec 2021 |
| 352 | ROBERT M LENHART | Westmoreland County, PA | Gas Property | Dec 2023 |
| 353 | ROBERT MITCHELL 8 | Indiana County, PA | Gas Property | Dec 2023 |
| 354 | ROBERT MURPHY | Westmoreland County, PA | Gas Property | Dec 2023 |
| 355 | ROBERT N BROTHERS | Clearfield County, PA | Gas Property | Dec 2023 |
| 356 | ROBERT OSGOOD | McKean County, PA | Gas Property | Dec 2023 |
| 357 | ROBERT SAWYER | Clarion County, PA | Gas Property | Dec 2023 |
| 358 | ROBERT SHORTS | Washington County, PA | Oil & Gas Property | Mar 2024 |
| 359 | ROBERT SMITH | Washington County, PA | Gas Property | Feb 2024 |
| 360 | ROBERT SPENCER | Erie County, PA | Gas Property | Dec 2018 |
| 361 | ROBERT SPENCER | Clearfield County, PA | Oil & Gas Property | Dec 2023 |
| 362 | ROBERT STRONG | Indiana County, PA | Gas Property | Dec 2023 |
| 363 | ROBERT V MAINE | Jefferson County, PA | Gas Property | Dec 2023 |
| 364 | ROBERT W. GRAY FM AT | Westmoreland County, PA | Oil & Gas Property | Dec 2023 |
| 365 | ROBERTA B JONES | Indiana County, PA | Oil & Gas Property | Dec 2023 |
| 366 | ROBERTS | Greene County, PA | Gas Property | Dec 2015 |
| 367 | ROBERTS 59 | Greene County, PA | Gas Property | Nov 2022 |
| 368 | ROBERTSON | Armstrong County, PA | Gas Property | Dec 2023 |
| 369 | ROBINHILL | Washington County, PA | Oil & Gas Property | Feb 2024 |
| 370 | ROBINSON | Susquehanna County, PA | Gas Property | Mar 2024 |
| 371 | ROBINSON | Armstrong County, PA | Gas Property | Dec 2023 |
| 372 | ROBINSON | Bradford County, PA | Gas Property | Feb 2024 |
| 373 | ROBINSON | Fayette County, PA | Oil & Gas Property | Mar 2024 |
| 374 | ROBINSON | Warren County, PA | Oil & Gas Property | Dec 2022 |
| 375 | ROBINSON 82 | Indiana County, PA | Gas Property | Dec 2023 |
| 376 | ROBINSON CAMPBELL 11132 | Washington County, PA | Gas Property | Feb 2024 |
| 377 | ROBINSON FERGUSON | Bradford County, PA | Gas Property | Mar 2024 |
| 378 | ROBY GROSE | Jefferson County, PA | Oil & Gas Property | Dec 2023 |
| 379 | ROCHESTER & PGH | Clearfield County, PA | Gas Property | Dec 2023 |
| 380 | ROCHESTER & PGH C | Indiana County, PA | Oil & Gas Property | Dec 2023 |
| 381 | ROCHESTER & PGH COAL | Jefferson County, PA | Gas Property | Dec 2023 |
| 382 | ROCHESTER & PGH COAL | Armstrong County, PA | Oil & Gas Property | Dec 2023 |
| 383 | ROCHESTER & PGH COAL | Indiana County, PA | Oil & Gas Property | Dec 2023 |
| 384 | ROCHESTER & PGH COAL CO | Jefferson County, PA | Gas Property | Dec 2023 |
| 385 | ROCHESTER & PGH COAL CO | Jefferson County, PA | Gas Property | Dec 2023 |
| 386 | ROCHESTER & PGH COAL CO | Indiana County, PA | Oil & Gas Property | Dec 2023 |
| 387 | ROCHESTER & PITT | Indiana County, PA | Gas Property | Dec 2023 |
| 388 | ROCHESTER & PITTS | Indiana County, PA | Oil & Gas Property | Dec 2023 |
| 389 | ROCHESTER & PITTSBURG | Armstrong County, PA | Gas Property | Dec 2023 |
| 390 | ROCHESTER & PITTSBURGH CO | Indiana County, PA | Gas Property | Dec 2023 |
| 391 | ROCHESTER & PITTSBURGH COAL | Westmoreland County, PA | Oil & Gas Property | Dec 2023 |
| 392 | ROCHESTER & PITTSBURGH COAL CO | Armstrong County, PA | Oil & Gas Property | Dec 2023 |
| 393 | ROCHESTER & PITTSBURGH COAL CO | Indiana County, PA | Gas Property | Dec 2023 |
| 394 | ROCHESTER & PITTSUBRGH COAL CO | Indiana County, PA | Oil & Gas Property | Dec 2023 |
| 395 | ROCK FURNA | Armstrong County, PA | Gas Property | Dec 2023 |
| 396 | ROCK RUN | McKean County, PA | Oil Property | Dec 2023 |
| 397 | ROCKS | Bradford County, PA | Gas Property | Oct 2023 |
| 398 | ROCKWELL | Crawford County, PA | Oil & Gas Property | Dec 2023 |
| 399 | RODE | Greene County, PA | Gas Property | Dec 2023 |
| 400 | RODNEY T MCDIVITT ET UX | Jefferson County, PA | Gas Property | Dec 2023 |